Related Clues:

• ''In the blink of an eye . . .''
• Relative of 'POW!'
• Sound that a punch in the gut elicits
• Cartoon fight sound
• Reaction to a sock in the gut
• Ka-boom!
• Comic book onomatopoeia
• 'You got me good!'
• Word in old ''Batman'' shows
• "Thwack!"
• Cry after taking a blow
• 'That's rough!'
• Wind-knocked-out sound
• 'That sounds painful'
• "That sounds painful"